The ProMag M1 Carbine Magazine is the perfect aftermarket magazine for your rifle. This magazine is for .30 Carbine and holds 10 rounds of ammunition. It is made of steel and comes in a blued finish. Expertly machined for exceptional quality and guaranteed to feed and function for every shot. ProMag magazines include a lifetime guarantee, if you ever have a problem with their magazines; simply return them to ProMag for replacement.